What is a AVIF file?
AVIF is built on the AV1 video codec and delivers the strongest compression of any mainstream image format — files are often about half the size of an equivalent JPG and noticeably smaller than WebP at the same visual quality. It supports transparency, HDR, and wide color gamuts.
In short, AVIF is the newest web format with the best compression available. It is best for performance-critical websites where every kilobyte counts, and modern image pipelines that can serve fallbacks. Its main limitations are encoding is slower than other formats, and very old browsers or desktop tools may not open AVIF files.
Why convert AVIF to WebP?
WebP was created by Google to replace both JPG and PNG on the web. It supports lossy and lossless compression, transparency, and even animation in a single format. In lossy mode WebP files are typically 25–35% smaller than a JPG of comparable visual quality, which directly improves page-load speed and Core Web Vitals.
Converting from AVIF to WebP makes sense when you need website images of every kind — product photos, hero images, thumbnails — where smaller files mean faster pages. WebP is supported by all modern browsers (Chrome, Firefox, Safari 14+, Edge).
Both formats support transparency, and this converter preserves the alpha channel — transparent areas in your AVIF stay transparent in the WebP.
How to convert AVIF to WebP
Drag and drop one or more AVIF files into the box above (or click to browse). Adjust the quality slider if you want smaller files or higher fidelity, then press Convert. Each file is decoded and re-encoded as WebP on your own device in a second or two, and you can download results individually or grab everything as a ZIP.
Unlike most online converters, FileLark never uploads your files to a server. The conversion runs entirely inside your browser using modern web technology, which means it works offline once the page has loaded, there are no file size queues or daily upload limits, and your images can never be stored, scanned, or leaked — they simply never leave your device.